Fluorinating Dopant-Free Small-Molecule Hole-Transport Material to Enhance the Photovoltaic Property

2021 ◽  
Vol 13 (6) ◽  
pp. 7705-7713
Author(s):  
Yi Kai Wang ◽  
Hui Ma ◽  
Qiaoyun Chen ◽  
Quan Sun ◽  
Zhengxu Liu ◽  
...  
Keyword(s):  
Small Molecule ◽  
Photovoltaic Property ◽  
Hole Transport

scholarly journals Origin of Hole Transport in Small Molecule Dilute Donor Solar Cells

2021 ◽  
pp. 2000042
Author(s):  
Waldemar Kaiser ◽  
Lakshmi N. S. Murthy ◽  
Chin‐Lung Chung ◽  
Ken‐Tsung Wong ◽  
Julia W.P. Hsu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Hole Transport

Trap-controlled hole transport in small molecule organic semiconductors

2007 ◽  
Vol 91 (24) ◽  
pp. 242103 ◽  
Author(s):  
Arne Fleissner ◽  
Hanna Schmid ◽  
Christian Melzer ◽  
Heinz von Seggern
Keyword(s):  
Organic Semiconductors ◽  
Small Molecule ◽  
Hole Transport

scholarly journals Quantum Dots: Inkjet‐Printed High‐Efficiency Multilayer QLEDs Based on a Novel Crosslinkable Small‐Molecule Hole Transport Material (Small 16/2019)

Small ◽  
2019 ◽  
Vol 15 (16) ◽  
pp. 1970083 ◽  
Author(s):  
Liming Xie ◽  
Xueying Xiong ◽  
Qiaowen Chang ◽  
Xiaolian Chen ◽  
Changting Wei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Small Molecule ◽  
High Efficiency ◽  
Hole Transport

The role of molecular volume and the shape of the hole transport molecule in the morphology of model charge transport composites

2010 ◽  
Vol 88 (3) ◽  
pp. 247-259 ◽  
Author(s):  
Ferdous Khan ◽  
Shalini Khanna ◽  
Ah-Mee Hor ◽  
P. R. Sundararajan
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Charge Transport ◽  
Small Molecules ◽  
Small Molecule ◽  
Hole Transport ◽  
Random Coil ◽  
Molecular Volume ◽  
Van Der Waals Volume

We present a study of the morphology and molecular interactions in a model charge transport composite with 1,1-bis(di-4-tolylaminophenyl) cyclohexane (TAPC) as the hole transport molecule in bisphenol-A polycarbonate (BPAPC) and cyclohexyl polycarbonate, also known as bisphenol-Z polycarbonate (PCZ). Solution NMR shows that while there is aromatic interaction between the phenyl groups of the polycarbonate and TAPC, the broadening of the peaks corresponding to the latter indicates a decrease in the rotational motion. FTIR spectroscopy also exhibits frequency shifts of the aromatic C–H absorption peaks, which parallels the extent of the depression of the glass transition temperature (Tg) of the polycarbonate. These are compared with the previous results for N,N-diphenyl-N,N-bis(3-methylphenyl)-[1,1-biphenyl]-4,4-diamine (TPD) and tri-p-tolylamine (TTA), and the differences are rationalized on the basis of the molecular shape and van der Waals volume of the small molecules. It is proposed that when the polycarbonate is in a random coil conformation, spherical small molecules (e.g., TAPC and TTA) reduce the glass transition temperature much more than a rodlike small molecule (e.g., TPD). Annealing at a temperature just below the Tg of the polycarbonate was used as a means of simulating accelerated ageing. Upon annealing, phase separation and crystallization of TAPC occurs and leads to a recovery of the Tg of the polymer significantly. The Tg recovery in this case is much more significant than in the case of TPD. The average crystal sizes are about ten times smaller than the crystals obtained in the case of TPD for the same temperature of annealing. To enhance the charge mobility, it might actually be advantageous to induce submicron crystals of the small molecule, while keeping the film transparent.

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